Stitcher roll



Patented Bec. 5, l922.

, narra 'starts refrn? tritt. f i

WILLIAM R. RARSNL, or AKRON, OHIO, .assIeNoRrO THR GOODYRARTIRE a RUBBERCOMPANY, or AKRONOHIO, a CORPORATION or OHIO. I I

sfrIroIInR ROLL.

vApplication filed .February 7, 1917. Serial No. 147,178. I." I

To all whom t may concern.'

Be itknown that I, WILLIAM B.4 HARsEL, a citizen ofthe United States,residing atl Akron, in the `county of Summit and State of Ohio, haveinvented new and useful Ime.I provements in Stitcher Rolls, of `whichthe following is a specification.`

My present invention relates vto stitching devices for laying down thefabric plies, during the building up of a pneumatic tire carcass. I I 1According to -modern methods of manufacture, pneumatic vehicle tiresare'laid up upon a ring core ply by ply, each ply being stitched down inclose conformity with the core which it annularly venvelops Av pair ofstitching devices are-customarily employed to operate upon oppositesides of the' carcass from the center ofthe tread to the bead portion,the stitchers rotating in contact with the revoluble core and beinggradually moved around their halves .of the tire? cross-'section inradial fashion from `crown to bead until the entire fabric ply' v yyembodiment of the invention:

operated `upon has been laid into complete conformity with the buildingcore. I

I have discoveredthat results secured in stitching` down fabrics upontheir'I cores vary in accordance with the particular type of stitoheremployed. Frequently a single stitching of a carcass is not suficient tolay the ply exactly and firmly into its place in the tire carcass, owingto the development lof wrinkles or to the lack of adhesion between theply and the core or between the ply and a previously appliedply.- lnmany I instances these flaws require manual labor` on the part of thetire builder in lstitching i *down those portions of the ply which arefound to be incorrectly applied. Partienlarly is this the case in thetire areas adjacent the vbeads of the oppositeytire toes, since the beadline forms an annular ridge upon veach, side of the carcass which the pstitcher wheel must surmount. As the ordinary single Vdisk stitcherwheel is able only7 to lay the fabric in entire conformity with* thisbead line on one side of the ridge at a time, it is ofjfrequentOccurrence that a faulty and insecure laying of the ply across the beadresults. f l

In view of these conditions, it has been one jof the principal objectsof this inven tion to provide a stitcher roll formed of a pair stitchingdisksv adapted to cover' adjacent areasof the carcass which the` rollIis 'in contact.

lIt is another object ofthe"` invention to providezfa stitcherrollfcomposed of a plu-- rality of stitchingfdisks which are' independently mounted for rotation in' contact4 with the carcass v.fabric tobe stitchedfthe rolls being preferably l,of slightly varying diametersin order.:that they may straddle the ridge formed by the lateral apexof' the bea-d to advantage, and thusstitch down] .the carcass fabricsimultaneously on both sides of this bead ridge. M

IThe above and additional "objects Lofa similar nature, which will tbeyhereinafterv abri@ y wat,

more specifically treated, are preferably ac ,complis'hed by such means.asfareillustrated in the accompanyingl drawings, de-v. I

.scyzribed'A iny the following specificatiomandy then more particularlykpointed out indthe f claims which are 4appended lhereto" andk form apart of this application. I I.

lnfthe vdrawings illustrating aI preferred The 'figure is a sectionalperspective view "The preferred form of stitchi'no`- devicecontemplatedv herein includes av siliank orI l-provided with am likedbearing annulus- 6 betweenwhich and a removable bearing annulus I7, arepositioned the stitcherI I "disks 8 and `9. Each of these disks isprovided with a central aperture 10 which loosely surrounds vthe,extremities of Ithe arm',

I the disks being supported ywithinthe channel Y' provided by thespacedbearing annuli @and 7 by means of antifriction bearings 1l whichare arrangedf within suitable complemental ball races or channels12=formedv ini` the re-A bearings.y

95 spective facing wallsof the disks'rand their L I A similar .pair ofball races l'provides a channel 'between the adjacent faces of the disks8 and 9 themselves, and serve to vseat antifriction'bearings llwhich'permit the independent rotation of the" disks withrespect toeachother. The outer extremity of the arm 5 is formed with a conical cavity'15 provided with internal screw threads for theaccommodation-oftheexpanding member 16.y The walls of the cavity 1'5 are transverselyslotted `in the manner .indicated by the nu-v 18. The lareer disk oi thetwo laterali f' ollows the smaller disk around the cross-sectionalperiphery ot the tire carcass on the revoiuble core 20, in the directionindicated by the arrow, as the two proceed along the tire .circumferenceside by side in an evernarrowing spiral. rihis larger disk is adapted tovcontact with the outer portion of the annular bead ridge whenv thestitcher roll is straddling the lateral apex line of the bead,

the parts being then in the position chosen :tor illustration.

The mentioned faults in the present practice are overcome by employmentof the stitcher device proposed by the present invention, since theindependently revoluble stitcher disks provide for a double stitchingoit each portion oit the carcass periphery with which the deviceengages. Particularly noticeable is the improvement in laying successiveplies or' a tire carcass over the ridge provided by the tire beads,since the material is simultaneously compressed and formed around theouter bead edge on both sides of the ridge provided by the lateral apexof the bead. Moreover, by providing a compound stitcher wherein one otthe stitching disks follows the otier in its cross-sectional path aroundthe tire carcass, a much more eii'ective layingI of the various plies inconformity with the core upon which the tire is builded results,inasmuch as any portion of the ply which is insecurely stitched down bythe passage ot the .first disk 8 thereover is restitchedinto place bythe following disk 9.

lt is to be understood that the shank 5 vof the stitcher roll may bemounted upon any supporting means 19 and thatits movement about thecross-sectional periphery of the carcass may be controlled manually orin any mechanical manner which suggests itself as being` desirable.

`What l claim is:

1. 1n a tire-making machine, a stitching unit comprising` a plurality otrotatable stitching disks arranged side by side and having a commonaxis, and means for sup-` porting the disks in permanently spacedapartrelation for movement over the surface ot a tire while in peripheralContact therewith, whereby one disk 'follows the other trom thecrownlto' the base orn the tire.

2, 1n a tire-making machine, a stitching unit comprising a pair ofrotatable stitching disks arranged side by side and having their axesalined, and means lor supporting thc disks lor movement overy thesurface oi a tire lir peripheral spaced-apart contact therewith from itssurface to its base, whereby the material on the tire may be twicestitched as one disk follows the other.

3. ln a tire-making machine, a stitching unit conrprising a plurality ofstitching disks arranged side by side and with their axes alined and inpermanently spaced-apart relation, and a shank for supporting the disksfor movement over the surface of a tire in peripheral Contact therewith,whereby one disk follows theother from the crown to the base or thetire.

l. ln a tire-making machine, a stitching i unit comprising a pair oistitching disks of different diameters, arrangedside by side inpermanently spaced-apart relation .and with their axes in approximatealinement, and means lfor supporting the disks in peripheral contactwith an associable tire while traversing it trom its crown toits basewhereby the material on the tire may be twice stitched by the successiveoperation of the disks. c

5. ln a tire-making machine, a stitching unit comprising a pair or'stitching disks ar,- ranged side by sideV in spaced-apart relation, andmeans, including a shank, tor-supporting the disks in a 'constantlyspacedapart relation and with vtheir axes in -approximate alinementwhile in peripheral contact with a tire from its crown to its base, andwhereby the disks are caused to straddle the bead of the tire' when theyreach the same.

6. ln a tire-making machine, a stitching unit comprising a pair ot disksof diiierent diameters arranged side by side, and a shank for supportingthe disks in spaced-apartmlation during theirperipheral contact with thetire, which they are adapted to traverse from the crown tothe base,whereby the smaller disk precedes the larger and both disks straddle abead on the tire when `the disks reach the bead.

7. ln a tire-making machine, a stitching unit comprising a pair offreely-rotatable stitching elements hai/'ing 'continuous anduninterrupted peripheries, and a support on which the disks are arrangedin parallelism and in cooperatively close, but spaced-apart, relationand actuatable for movingthe elements trom the crown to the base of thelstitcher elements of relatively different diameters, and a support yonwhich the elements are mounted in parallelism and in spacedapartrelation, and operable for moving said elements over the surface of thetire from its crown to its base, whereby one element tracks the otheracross the surface of one side of the tire, both elements simultaneouslyengaging the tire.

9. A stitching unit for traversing the side of a carcass-forming core,including a support and a pair of stitclier elements associated in(5o-operatively close but spacedapart relation on the support and freelyrotatable thereon in approximate parallelism, and means for rotatablyspacing the elements apart.

10. A stitcher roll including a plurality of stitching disks,antii'riction means mounting the separate disks and antifriction meansseparating the disks.

11. A stitcher roll including a plurality of stitching disks;anti'friction means similarly mounting the respective disks forrotation; and antifriction means spacing the disks for independentrotation thereof.

12. A stitcher roll including a plurality of stitching disks; anv arm; afixed bearing carried by the arm; a removable bearing carried by thearm; a pair of stitcher disks mounted between the bearings and antifricDGSSBS.

tion means separating'the disksl for inde` of stitching disks; an arm; aixedbearing.

carried by the arm; a removable bearing carried by the arm; a pair ofstitcher disks mounted between the bearings; antifriction meansseparating the disks for independent rotation and means for adjustingsaidiremovable bearing upon said arm and for' maintaining it in theadjusted position.

14. A tire-stitching unit for tire-making machines including` aplurality of stitching members, and means for supporting said'v membersin spaced-apart relation .and for independent contact with thesurface ofa tire, said means including a support common to the members, bearingelements between the support and the members, and bearing 'elementsbetween the members.v

In testimony whereof l have signed `my name inthe presence of twosubscribing witwiLLiAM Bf Hansen llVitnesses: l

B. J. MCDANEL. C. L. LANDON.

